package com.mfm.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(value = "/*")
public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        //获得请求地址
        String requestURI = request.getRequestURI();
        Object login = request.getSession().getAttribute("login");

        if (requestURI.endsWith("login.jsp") ||
                login != null ||
                requestURI.endsWith(".js") ||
                requestURI.endsWith(".css") ||
                requestURI.contains("img") ||
                requestURI.endsWith("login")) {
            filterChain.doFilter(request, response);
        } else {
            response.sendRedirect("login.jsp");
        }
    }

    @Override
    public void destroy() {

    }
}
